Convert TGZ to APK

An Android device accepts an APK, not a TGZ, so a TGZ may need processing when an app was delivered as an archive or an Android project must produce an installable package. The correct operation is extraction and, when necessary, compilation; changing the filename extension does not convert the file.

What the TGZ format is

TGZ is a tar archive compressed with gzip, also written as .tar.gz. Unix and Linux tools, source-code repositories, build systems, and Android development workflows use it to bundle directories while preserving paths and, where supported, permissions.

A TGZ in a mobile-development context may contain an Android Studio project with settings.gradle or settings.gradle.kts, Gradle build files, gradlew, an AndroidManifest.xml, source code, resources, and native libraries. It may instead contain a finished APK or unrelated files. The archive extension does not identify its contents.

What the APK format is

An APK is Android's installable application package. It is a ZIP-based package containing compiled application code, resources, a manifest, optional native libraries, and Android signing data. Android's package manager checks the APK signature, requested permissions, minimum and target SDK requirements, device policy, and compatible CPU architecture before installation.

An APK is a build output, not an Android project archive. The Android Gradle Plugin compiles source and resources, packages them, and signs the result. Therefore, an archive containing source code must be built; an archive containing an existing APK only needs extraction. APKs support direct testing and sideloading, including offline installation, but Play Store publishing generally uses an Android App Bundle (.aab) instead.

How to process a TGZ containing an APK

1. Extract the TGZ with a desktop utility such as 7-Zip or PeaZip, or with the command line:

tar -xzf package.tgz -C extracted

2. Search the extracted directory for files ending in .apk. Inspect the filename and location to select the intended variant, such as debug, release, or a device-specific build.
3. Copy the APK to the device and open it, or install it with Android Debug Bridge:

adb install path/to/app-release.apk

Enable installation from the relevant unknown-source setting when sideloading through a file manager, and do not install an APK from an untrusted source. If the package manager rejects it, check the signature, Android version, CPU architecture, device policy, and whether another installation with a different signing key already exists.

Only restore the .apk extension if the file is actually an APK whose name was changed. A TGZ is gzip-compressed TAR data; renaming it to .apk cannot make it installable. A genuine APK is ZIP-based and can be identified by its file structure or by opening it with an archive tool, but renaming alone should not be used to bypass security controls.

How to build an APK from an Android project

1. Install Android Studio, the JDK version required by the project's Android Gradle Plugin, and the Android SDK components it requires. Extract the TGZ into a writable directory.
2. Open the extracted project in Android Studio with File → Open. Choose the directory containing settings.gradle or settings.gradle.kts, not the TGZ file itself.
3. Allow Gradle synchronization to complete. Install requested SDK platforms and build tools, and resolve dependencies from the repositories declared by the project. A project with missing source files, unavailable private dependencies, or incompatible Gradle and plugin versions cannot be built without modification.
4. For a test build, select Build → Generate App Bundles or APKs → Generate APKs and choose the required module and variant. Android Studio normally places the result under app/build/outputs/apk/, although the module name and product flavors can change that path.
5. For distribution, use Build → Generate App Bundles or APKs → Generate Signed App Bundle or APK, select APK, and sign the release variant with a private keystore. Keep the keystore and passwords separate from the TGZ and source repository.

The equivalent Gradle commands, run from the project directory, are:

./gradlew assembleDebug
./gradlew assembleRelease

On Windows, use gradlew.bat assembleDebug or gradlew.bat assembleRelease. Projects with flavors may require a task such as assembleFreeRelease; list available tasks with ./gradlew tasks.

Online and desktop tool choices

7-Zip and PeaZip are suitable desktop extractors for TGZ files. Android Studio with the project's Gradle wrapper is the appropriate local build tool; using the wrapper preserves the Gradle version expected by the project.

There is no reliable generic online TGZ-to-APK converter: a web service cannot infer how arbitrary source code should be compiled, supply private dependencies, select compatible SDK versions, or produce a release signature safely. For a cloud build, a repository-based service such as GitHub Actions or Codemagic can run the project's Gradle build, but configure the workflow, SDK, dependencies, signing secrets, and artifact handling yourself. Do not upload proprietary source code or keystores to an unverified converter.

Compatibility and quality limits

A TGZ containing arbitrary files, Linux binaries, incomplete source, or only an Android library module does not automatically yield an APK. A successful build does not guarantee installation: the package may require a newer Android release, unsupported ABI, unavailable hardware, permissions blocked by policy, or a signing key that conflicts with an installed version.

Debug APKs are signed with a debug key and are intended for testing. Release APKs require a controlled signing key, and changing that key prevents an update over an existing installation signed by the original key. If the project supports several architectures or Android versions, build the appropriate variants or use the project's documented packaging configuration.